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FIG. 13. October–December 1999 Southern Hemisphere (a) stratospheric temperature anomalies (shaded, C) derived from the MSU channel 4 and 50-hPa height anomalies (contours, m), (b) 50-hpa height (contours, m) and zonal wind speed (shaded, m s-1), and (c) mean October–December 50-hPa height (contours, m) and zonal wind speed (shaded, m s-1). Contour interval for height and height anomalies is 120 m. Negative height anomalies in (a) are indicated by dashed contours. Anomalies are departures from the 1979–98 base period means. (MSU data provided by the University of Alabama in Huntsville.)